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  • Question
  • Who has discovered an Earth-sized planet, HD 21749b using Transiting Exoplanet Survey Satellite?


  • Options
  • A. ISRO
  • B. NASA
  • C. SpaceX
  • D. JAXA

  • Correct Answer
  • NASA 

    Explanation
    NASA's the Transiting Exoplanet Survey Satellite (TESS) has discovered an Earth-sized planet, HD 21749b and a "sub-Neptune" world, revolving around the star, HD 21749. The star lies 53 light-years from Earth. The research study has been published on 15th April, 2019 in 'The Astrophysical Journal Letters'. TESS was launched to Earth orbit in April 2018 on a SpaceX Falcon 9 rocket. One tool termed as 'Planet Finder Spectrograph' (PFS) on the 'Magellan II telescope' in Chile helped to confirm the planetary nature of the TESS signal and measure the mass of HD 21749b. HD 21749b is about 23 times heavier and 2.7 times wider than Earth. It is gaseous, has a substantial atmosphere but not as puffy as Uranus and Neptune. HD 21749b has an orbital period of 36 Earth days.

  • More questions

    • 1. Name the country which has agreed to strengthen economic co-operation with India.

    • Options
    • A. Japan
    • B. US
    • C. Netherland
    • D. Russia
    • Discuss
    • 2. Name the country which won the Sultan Azlan Shah Cup 2019.

    • Options
    • A. Malaysia
    • B. India
    • C. South Korea
    • D. Canada
    • Discuss
    • 3. Which of the following movies won the 74th Golden Globes Best Motion Picture Award in the Drama category?

    • Options
    • A. La La Land
    • B. Moonlight
    • C. Nocturnal Animals
    • D. Fences
    • Discuss
    • 4. Which bank has reduced its benchmark lending rate by 0.05% points?

    • Options
    • A. Syndicate Bank
    • B. Union Bank of India
    • C. Allahabad Bank
    • D. Bank of India
    • Discuss
    • 5. The Union Government in recent past revised the Mode of Moderation and Memorandum of Understanding to establish the Border Haats with this country.

    • Options
    • A. Myanmar
    • B. Nepal
    • C. Bangladesh
    • D. Sri Lanka
    • Discuss
    • 6. Former Union Minister, Akhilesh Das Gupta passed away in Lucknow, Uttar Pradesh on 12 April 2017, after suffering from a heart attack. Which party did he serve under in the government?

    • Options
    • A. Bharatiya Janata Party
    • B. Congress Party
    • C. Samajwadi Party
    • D. Bahujan Samajh Party
    • Discuss
    • 7. Which film has won the Golden Bear Award at the 67th Berlin International Film Festival-2017?

    • Options
    • A. Bright Nights
    • B. The Other Side of Hope
    • C. On Body and Soul
    • D. Close Knit
    • Discuss
    • 8. Who is the author of the book "Mr and Mrs Jinnah: The Marriage that Shook India"?

    • Options
    • A. Teesta Setalvad
    • B. Bertil Falk
    • C. Sheela Redddy
    • D. Audrey Truschke
    • Discuss
    • 9. Name the Bank which became the second largest public sector undertaking (PSU) bank.

    • Options
    • A. Axis Bank
    • B. Bank of Baroda
    • C. Union Bank of India
    • D. Dena Bank
    • Discuss
    • 10. As per an announcement by the Union Government, India's nuclear power generation capacity will be tripled by

    • Options
    • A. 2021
    • B. 2022
    • C. 2023
    • D. 2024
    • Discuss


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